Data for visits to US National Parks was obtained from the NPS Integrated Resource Management Applications (IRMA) website, filtered for parks ending in "NP" (52 parks).
Link to data:
Total visits by Year (millions, all NPs):| 2008 | 2009 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 |
|---|---|---|---|---|---|---|---|---|---|
| 62.06 | 64.27 | 66.05 | 64.01 | 66.34 | 64.48 | 69.29 | 75.42 | 82.49 | 83.57 |